You could use the bidirectional one, but to feed an analog meter, you would need to put the equivalent of a 2.5v zener diode in series with the output to offset the zero voltage. There are other ways of doing this with an op amp (more complicated).
In a brushed system, the bidirectional feature is not needed. Even in a brushless system, you could get by with a unidirectional sensor since you can easily filter the output. The actual motor current won't change that fast unless it shorts out or something.
I guess you should have bought the cheaper one, but the one you have will work.
In a brushed system, the bidirectional feature is not needed. Even in a brushless system, you could get by with a unidirectional sensor since you can easily filter the output. The actual motor current won't change that fast unless it shorts out or something.
I guess you should have bought the cheaper one, but the one you have will work.